Nature's Answer Cascara Sagrada Bark Description: Promotes A Laxative Action Single Herb Supplement Once Daily Cascara Sagrada bark (Rhamnus purshiana), whose name translates to "sacred bark," has a long history of use as a natural laxative. Nature's Answer uses Cascara Sagrada that has been aged for one year for optimum potency. Free Of Synthetic ingredients. Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.